Medically, what happens when an old injury starts aching due to a weather change?

Question

Title 🙂

In: Biology

Answer 1

They are filled with some sort of pressurized fluid. When the weather changes, so does the air pressure, when it does, there is a different amount of pressure on the fluid, so it expands/contracts. This can be painful depending on the wound.

This also lets arthritic people feel weather in their bones.